Drupal core's Image module allows for the on-demand generation of
image derivatives. This capability can be abused by requesting a large
number of new derivatives which can fill up the server disk space,
and which can cause a very high CPU load. Either of these effects may
lead to the site becoming unavailable or unresponsive (CVE-2013-0316).

Drupal's form API has built-in cross-site request forgery (CSRF)
validation, and also allows any module to perform its own validation
on the form. In certain common cases, form validation functions may
execute unsafe operations (CVE-2013-6385).

Drupal core directly used the mt_rand() pseudorandom number
generator for generating security related strings used in several
core modules. It was found that brute force tools could determine the
seeds making these strings predictable under certain circumstances
(CVE-2013-6386).

Image field descriptions are not properly sanitized before they are
printed to HTML, thereby exposing a cross-site scripting vulnerability
(CVE-2013-6387).

A cross-site scripting vulnerability was found in the Color module. A
malicious attacker could trick an authenticated administrative user
into visiting a page containing specific JavaScript that could lead
to a reflected cross-site scripting attack via JavaScript execution
in CSS (CVE-2013-6388).

The Overlay module displays administrative pages as a layer over the
current page (using JavaScript), rather than replacing the page in
the browser window. The Overlay module did not sufficiently validate
URLs prior to displaying their contents, leading to an open redirect
vulnerability (CVE-2013-6389).

The updated packages has been upgraded to the 7.24 version which is
unaffected by these security flaws.

Update:

Additional apache ACL restrictions has been added to fully conform
to the SA-CORE-2013-003 advisory.
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